Mention Weblate and translations in readme

3 jobs for master in 12 minutes and 42 seconds (queued for 4 seconds)
Status Job ID Name Coverage
  Lint
passed #13640
lint

00:01:55

 
  Test Backend
passed #13641
test_backend

00:06:33

 
  Test Frontend
passed #13642
test_frontend_unit

00:04:12